CVE-2020-15889

lua: heap-based buffer over-read in lgc.c

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Severity

Important

Red Hat Product Security

8.1

CVSS 3.1

Review impact separately from score.

Published · July 6, 2020

Updated · November 21, 2025

Description

Lua 5.4.0 has a getobjname heap-based buffer over-read because youngcollection in lgc.c uses markold for an insufficient number of list members.

Statement

The affected code was introduced via https://github.com/lua/lua/commit/f5f3df3bd17fb3489bbd26ab39fe1580a8dbf9c9 which is part of lua-5.4. Therefore versions of lua package shipped with Red Hat products is not affected by this flaw.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 8.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-122 · Heap-based Buffer Overflow